Shares rose 2.83% to $395.14 on Wednesday, topping the previous $388.96 peak set on May 5 and marking a second straight daily gain.
The move came as broader markets advanced, with the S&P 500 up 1.46% and the Dow Jones Industrial Average gaining 1.24%.
Alphabet outperformed major peers including Microsoft, Amazon and Meta, while trading volume of 22.1 million exceeded its 50-day average of 19.5 million.
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